How to set tag on YouTube video one app

Tag app link https://play.google.com/store/apps/details?id=com.olegorlov.youtubetags Tag (metadata) Not to be confused with Markup language or HTML element tags. A tag cloud with terms related to Web 2.0 In information systems, a tag is a keyword or term assigned to a piece of information (such as an Internet bookmark, digital image, database record, or computer file). This kind of metadata helps describe an item and allows it to be found again by browsing or searching.[1] Tags are generally chosen informally and personally by the item’s creator or by its viewer, depending on the system, although they may also be chosen from a controlled vocabulary.[2]:68 Tagging was popularized by websites associated with Web 2.0 and is an important feature of many Web 2.0 services.[2][3] It is now al